Bought a cheap Samsung Galaxy S5 and managed to get adb and fastboot installed on my win pc but TWRP and Heimdall are a compete mystery. Just too involved for me to grok. Perhaps someday will be easier.
Update: got zadiag to install the driver but Heimdall print-pit does nothing.
Odin doesn’t see the phone so can’t use it to install TWRP. It’s an S4.